package com.wayhome.springfarmework.core.io;

import cn.hutool.core.lang.Assert;
import com.wayhome.springfarmework.util.ClassUtils;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

public class ClassPathResource implements Resource{


    private final String path;

    private ClassLoader classLoader;

    public ClassPathResource(String path){
        this(path, (ClassLoader) null);

    }

    public String getPath() {
        return path;
    }

    public ClassPathResource(String path, ClassLoader classLoader){
        Assert.notNull(path, "Path must not be null");
        this.path = path;
        this.classLoader = classLoader != null ? classLoader : ClassUtils.getDefaultClassLoader();
    }

    @Override
    public InputStream getInputStream() throws IOException {
        InputStream inputStream = classLoader.getResourceAsStream(path);
        if (inputStream == null){
            throw new FileNotFoundException(
                    this.path + " cannot be opened because it does not exist");
        }
        return inputStream;
    }
}
